I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
sente senate sent sienite senti scent sennet cenote seined seniti sennit sinuate send snit cent snot snout suint santo cento centu snoot scend saint centai sanity snooty snotty snouty sonata sonnet zonate sand sned
kente sente yente rente vawntie cento kainite hent kent menta bent keynote quinate keened antae gent bento gahnite binate reunite lenite rent lunate quinte lento genet monte lanate tent yenta sheened peened chantey weened scent unite tenty zonate tannate sent ante donate dunite minute dent pinnate senti neonate cenote auntie coontie pent dunnite lineate senate vent hyphened dinette meant sienite tentie connate shantey shent leant innate finite gunite feint pointe centu lent phonate note went lunette conte untie mannite mentee cent ruinate nite enate genette pinite cuneate tonette hyphenate pennate vauntie pantie phenate queened denote duende tenet connote
sen scena scene seen seine sene senna sewn sienna